Look in Vanna White's first book. Her patterns are all pretty easy, but there's one in there (can't remember the name of it) that you could practically crochet in your sleep. It's the one that she's been crocheting backstage for years, and has (probably) made hundreds of them.
If not, then just make a chain long enough for the length of the throw, and then just crochet rows (in whatever stitch you feel comfortable with) back and forth across until it's wide enough for you. Then, maybe do a single crochet round around the entire thing. voila!
(NOTE: If you use a large hook and hold more than one strand of yarn together, it will be even bigger, and work up even faster.) Have fun!